DESIGN FEATURES: This watch band is handmade with strong stitching and features a silver, gold, or black polished 316L stainless steel buckle, ensuring durability and offering a retro and luxurious appearance. SOFT MATERIAL: The front is crafted from suede leather with a natural texture and soft touch. The back is made of calfskin, which is smooth and comfortable against the wrist. The middle layer includes elastic nylon to maintain flexibility. QUICK RELEASE DESIGN: Equipped with quick release spring bars, allowing easy strap replacement without tools. Simply press the release mechanism with your finger to swap the strap quickly. LENGTH, WRIST SIZE, AND THICKNESS: Long end measures 120mm, short end 80mm (excluding buckle). Fits wrist sizes from 5.7 to 7.48 inches. Thickness ranges from approximately 2.8mm to 3.3mm. COMPATIBILITY: Available in 7 colors and 3 buckle finish options. Strap widths of 18mm, 19mm, 20mm, and 22mm are compatible with both traditional watches and smartwatches.